The cup is a unit of volume equal to 16 tablespoons or 8 fluid ounces. Keep reading to learn more about each unit of measure. Trucks, ships, and airplanes are limited in the amount of weight or volume they can transport, so if one of those quantities is known, but the limitation is on the other, then it becomes necessary to convert between the two so as not to overload the shipping vehicle. Ī third application of weight and volume conversions is when shipping freight when calculating the volumetric weight for cargo and packages. It is common to mix powdered chemicals with liquid, or aqueous, chemicals, and this is where it becomes very useful to convert between weights and volumes. When performing chemical reactions by combining separate chemicals to produce a new chemical, one must know the exact amount of each chemical to add in order to maximize the yield of the reaction. When a scale is not available, a calculator like the one above is a good way to estimate the volume to weight conversion.įor cooking and baking ingredients, you can get more specific results using our butter, flour, and sugar conversion calculators.Īnother useful application of weight and volume conversions is chemistry. The best way to ensure an accurate conversion is to use a scale. The density of dry ingredients can vary for a variety of reasons, such as compaction and clumping. Pounds = 5 c × 0.7 g/mL / 1.9172 = 1.8256 lb When to Convert Cups to PoundsĬups and pounds are both commonly used to measure cooking ingredients.įor cooking applications, most chefs suggest measuring dry ingredients by weight rather than volume to improve accuracy in the measurements. If the density is given in grams per milliliter (g/mL), then first divide the density by 1.9172 to convert to lb/c.įor a density given in g/mL, you can use this simple formula to convert: Note that in order for this to work, the density must be in pounds per cup (lb/c). To convert a measurement in cups to pounds, multiply the volume by the density of the ingredient, substance, or material. Therefore, to convert between cups and pounds of an ingredient or substance, we must either multiply or divide by its density, depending on which direction we are performing the conversion. In this case, we need to account for the density of the substance whenever we do a conversion. Since cups are a unit of volume and pounds are a unit of mass, which are different physical quantities, we need to know one more physical quantity of the ingredient or substance to convert between them. He specializes in math, science, and astrophysics. The absolute pressure of the tire is 79.7psia.Ethan has a PhD in astrophysics and is currently a satellite imaging scientist. To see the difference, a bicycle tire has a pressure of 65 psi. If you see psig, the means the pressure is relative to the atmospheric pressure. This extra pressure is the standard atmospheric pressure at sea level. Whatever the pressure is, 14.7 gets added. If you see psia, this refers to the pressure measured as if it were in a vacuum. It refers to pound-force per square inch or psi. Pounds can measure the amount of force or pressure applied to one square inch. Pounds are too large of a measurement for these metals. Grams are often used to measure the weight of precious metals. You will often see it used to express the amount of protein or fat required in a day. The gram is a common method of measurement for nutrition. In this system, 1 stone equals 14 pounds. The United Kingdom is similar but uses a "stone" system. In the United States, pounds is the method of measurement for expressing a person's weight. Grams are often used in countries where the metric system is the standard. Pounds are not used in cooking unless it is in an industrial application. Pounds work when measuring the weight of larger items. Grams are a measurement used when needing precise amounts of smaller quantities.
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